Rivet-removing device for chains.



F. B. WIDMAYER & V. E. DAVIS.

RIVET REMOVING DEVICE FOR CHAINS.

APPLICATION FILED AUG. 18, 1910.

Patented Aug. 15, 1911.

WITNESSES:

--n\\ mum-u m ummub 19 18b ATTORNEYS NIT D sTA'rns PATENT OFFICE.

FRANK B. WIDMAYER AND VOL'NEY E. DAVIS, OF NEW YORK, N. Y.

Specification of Letters Patent.

Patented Aug. 15, 1911.

Application filed August 18, 1910. Serial No. 577,850.

To all whom it may concern:

Be it known that we, FRANK B. WID- MAYER and VOLNEY E. DAVIS, both citizens of the United States, and residents of the city of New York, borough of Manhattan, inthe county and State of New York, have invented a new and Improved Rivet-Removing Device for Chains, of which the following is a full, clear, and exact descrlption.

This invention relates to certain improve ments in rivet-removing devices, and the object of the invention is to provide a simple device which may be readily carried in the tool-bag of a motor-cycle or automobile, for use in repairing the drive chain of the machine. I

Our improved device includes a punch and a hammer for driving the rivet out with the punch. The head of the hammer is so constructed as to receive and hold the chain, while the punch serves as a handle to turn a screw on the head of the hammer, to loosen the rivet preparatory to driving out the latter.

Reference is to be had to the accompanying drawings forming a part of this specification, in whichgsimilar characters of reference indicate corresponding parts in all the views, and in which Figure 1 is a perspective view of our improved device, the parts being in position for starting a rivet from a chain; Fig. 2 is a side elevation of the device, the head being shown in longitudinal section; Fig. 3 is a face view of the device, the chain not being shown; Fig. 4 is a side elevation showing the parts in position for driving out the rivet; and Figs. 5, 6 and 7 are side elevations of different forms of screws which may be employed in place of the screw illustrated in the figures previously referred to.

Our improved device includes a combined hammer and holding member 10 and a punch member 11. The first-mentioned member has a handle 12 and a head 13, which latter may, if desired, be substantially cubical in form. The head is provided with a transversely-extending slot 14 in the face thereof opposite to the handle 12, and intersecting this slot is a second slot 15, substantially at right-angles thereto. This slot 15 also extends into the face of the head opposite to the handle, and the two slots together serve to divide the outer end face of the head into two prongs or projections 16, 16, and a transverse flange 17. The width of the slot 15 is such that it may receive the rivet of a link chain, and the-slot 14 is of suflicient width to receive the side members or links proper. In the flange 17, we provide a screw 18, substantially in alinement with the center of the slot 15, and movable toward and from the latter. This screw has a pointed inner end 19 and a head 20 at its outer end. The head is preferably of such form that it may be gripped by a wrench, and preferably has an opening, through which the member 11 may extend. The member 11 is of slightly smaller diameter than the rivet of the chain, and at one end it is slightly pointed so as to constitute a punch. If desired, the free end of the handle 12 may be formed as a wedge, for use in prying apart the members of the chain if they do not readily separate after the removal of the rivet.

In using our improved device, the chain from which it is desired to. remove the rivet is placed in position in the head 13, as indicated in Figs. 1 and 2. One end of the rivet comes opposite the end 19 of the screw, and theside members of the chain links extend along the slot- 14. The two prongs or projections 16, 16, extend through the openings in the chain, which normally receive the teeth of the sprocket wheel. The punch is extended through the opening in the head 20, so as to constitutea handle member,- and this, handle member is turned relatively to the member 12, to force the screw to the position indicated in Fig. 2 and positively force the rivet partly through the link in spite of any enlargement or spreading which may be at the end of the rivet. As soon as the rivet is forced through the outer side link, the screw is turned back, and the punch 11 is placed in engagement with the end of the rivet, as indicated in Fig. 4C. The member 10 is then used as a hammer, with which the outer end of the punch may be pounded, to drive the rivet out the remainder of the distance. Less power is required for this final movement of the rivet than is required for the first part, as the first part necessitates the mutilation of the head of the rivet.

Our device is generally useful for removing rivets from chains, but is especially designed for use in the repairing of the "drive chains of automobiles and motor vehicles.. When 'the chain breaks on the road, it is ordinarilypverydiificult to repair it, as the ordinary tools carried; in the tool-kit are not suitable for-the purpose. By means of our improved device, two adjacent rivets may be easily forced out of lace so as to rentove any broken link, an a new link,

after being inserted, can easily be fastened by a simple riveting action by an ordinary hammer. v

Instead of using the pointed screw lllustrated in Fig. 2, We may change the shape In Fig. 7 we have lllustrated a screw 18 having a small punch end 19 similar to that shown at the leftvhand end of Fig. 6.

Having thus described ourinvention, we

claim as new and desire to secure by Let-v ters Patent;---

1. A device for removing rivets from chains, having a head formed to receive link members of a chain and arivet connecting the link members, a movable member "carried by said head and operable to remove the. rivet, and a removable handle for said last-mentioned member, said handle 'constitut-in a punch for 'efiecting the final removal 0 the rivet.

2. A device for removing rivets from chains, comprising a. hammer having a head provided wlth a transverse slot to receive link members of a chain, and a second slot intersectin the first-mentioned slot at rightangles" an serving to receive a rivet connecting the link members, a screw carried thesecond-mentioned slot, and a punch for efi'ecti'ng-the final removal of the rivet, said punch serving as a handle, by means of which said screw may be, rotated. I

35A device for removing rivets from chains, comprising a hammer having a head provided with a transverse slot to receive intersecting the first-mentioned slot, at'right angles, and serving to receive a rivet connecting the link members, a screw carried by said head and movable toward and away from said second-mentioned slot, said screw having a head provided. with an opening, and a handle removablymounted in said opening of said last-mentioned head, and

removal of the rivet.

names to this specification in the presence of two subscribing witnesses. I

FRANK B. WIDMAYER. VOLNEY E. DAVIS. T Witnesses: j i

FAIRBANK, JOHN RDAvIs.

constituting a punch for efiecting a .final.

In testimony whereof we have signed our Y by'the head and movable toward and from I link members of a chain, and a second slot, 

